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Related Concept Videos

Hypothyroidism II: Pathophysiology01:23

Hypothyroidism II: Pathophysiology

Hypothyroidism is a disorder characterized by insufficient production of thyroid hormones, which regulate metabolism, energy balance, and multiple organ systems.TypesHypothyroidism is classified based on the level of dysfunction. Primary hypothyroidism results from intrinsic thyroid gland dysfunction, causing reduced hormone production despite normal or increased stimulation. Secondary hypothyroidism arises from inadequate thyroid-stimulating hormone (TSH) secretion by the pituitary. Tertiary...
Graves' Disease I: Introduction01:28

Graves' Disease I: Introduction

Graves' disease is an autoimmune disorder that causes hyperthyroidism, or overactivity of the thyroid gland. It results from autoantibodies called thyroid-stimulating immunoglobulins (TSIs), which bind to thyroid-stimulating hormone (TSH) receptors, leading to overstimulation of hormone production and a hypermetabolic state.EtiologyAlthough considered idiopathic, Graves’ disease has well-established contributing factors. There is a strong genetic component, with increased prevalence in...
Hyperthyroidism II: Pathophysiology01:27

Hyperthyroidism II: Pathophysiology

Hyperthyroidism is a hypermetabolic state caused by elevated levels of thyroid hormones, triiodothyronine (T3) and thyroxine (T4). It results from dysregulation at the thyroid, pituitary, or immune system level and affects multiple organ systems.PathophysiologyThe most common cause of hyperthyroidism is Graves’ disease, an autoimmune disorder in which antibodies, specifically thyroid-stimulating antibodies (TSAb), a subtype of TSH receptor antibodies (TRAb), bind to and activate TSH receptors...
Hyperthyroidism I: Introduction01:25

Hyperthyroidism I: Introduction

Hyperthyroidism is a type of thyrotoxicosis characterized by the thyroid gland's overproduction of the thyroid hormones triiodothyronine (T3) and thyroxine (T4). This hormone excess increases the basal metabolic rate and enhances sensitivity to catecholamines.DiagnosisDiagnosis is based on clinical features and biochemical testing. It typically shows suppressed thyroid-stimulating hormone (TSH) levels below 0.4 mIU/L, with elevated free T3 and/or T4. Additional tests, including thyroid...
Graves Disease II: Pathophysiology01:24

Graves Disease II: Pathophysiology

Graves’ disease is an autoimmune disorder characterized by the production of thyroid-stimulating immunoglobulins (TSI) that activate TSH receptors, leading to excessive synthesis and release of thyroid hormones (T3 and T4) and resulting in hyperthyroidism.Among all causes of hyperthyroidism, Graves’ disease is the most common and can happen at any age, though it is more frequent in women. It produces a hypermetabolic state with features such as weight loss, tachycardia, tremor, and heat...
Glaucoma: Overview01:25

Glaucoma: Overview

Glaucoma is an eye condition characterized by increased intraocular pressure that damages the retina and optic nerve, leading to irreversible blindness if left untreated. The human eye has various components, including the cornea, iris, pupil, lens, and optic nerve. Aqueous humor is secreted by the epithelium of the ciliary body in the posterior chamber and flows through the trabecular meshwork and canal of Schlemm, maintaining normal intraocular pressure. The trabecular meshwork and the canal...

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Related Experiment Video

Updated: Jun 17, 2026

Using Eye-tracking to Assess the Relative Importance of Visual and Vestibular Input to Subcortical Motion Processing in the Roll Plane
07:24

Using Eye-tracking to Assess the Relative Importance of Visual and Vestibular Input to Subcortical Motion Processing in the Roll Plane

Published on: August 22, 2025

Ocular changes in primary hypothyroidism.

Banu T Ozturk1, Hurkan Kerimoglu, Oguz Dikbas

  • 1Department of Ophthalmology, Meram Faculty of Medicine, Selcuk University, Konya, Turkey.

BMC Research Notes
|December 31, 2009
PubMed
Summary

Hypothyroidism and its treatment did not significantly alter ocular measurements, including intraocular pressure, corneal thickness, anterior chamber dimensions, or retinal nerve fiber layer thickness in newly diagnosed patients. Ocular health remained stable throughout the study.

Related Experiment Videos

Last Updated: Jun 17, 2026

Using Eye-tracking to Assess the Relative Importance of Visual and Vestibular Input to Subcortical Motion Processing in the Roll Plane
07:24

Using Eye-tracking to Assess the Relative Importance of Visual and Vestibular Input to Subcortical Motion Processing in the Roll Plane

Published on: August 22, 2025

Area of Science:

  • Ophthalmology
  • Endocrinology
  • Medical Research

Background:

  • Hypothyroidism can potentially affect various bodily systems, including the eyes.
  • Previous research on ocular changes in hypothyroidism is limited, especially in patients without pre-existing orbitopathy.
  • Understanding these changes is crucial for comprehensive patient management.

Purpose of the Study:

  • To investigate ocular changes in patients newly diagnosed with hypothyroidism before and after treatment.
  • To assess the impact of hypothyroidism and its replacement therapy on specific ocular parameters.
  • To determine if hypothyroidism affects intraocular pressure, corneal thickness, anterior chamber dimensions, or retinal structures.

Main Methods:

  • A cohort of 33 newly diagnosed primary overt hypothyroidism patients was studied.
  • Ocular parameters including central corneal thickness (CCT), anterior chamber volume, depth, and angle were measured using Scheimpflug imaging (Pentacam).
  • Cup to disc ratio (C/D), mean retinal thickness, and mean retinal nerve fiber layer (RNFL) thickness were assessed using optical coherence tomography (OCT). Measurements were taken before and at 1, 3, and 6 months after initiating replacement therapy.

Main Results:

  • Thyroid hormone levels normalized in all patients during follow-up.
  • No statistically significant changes were observed in intraocular pressure (IOP), CCT, anterior chamber parameters, C/D ratio, mean retinal thickness, or mean RNFL thickness.
  • Ocular measurements remained stable throughout the 6-month treatment period.

Conclusions:

  • Hypothyroidism itself does not appear to cause significant changes in IOP, CCT, anterior chamber parameters, RNFL, retinal thickness, or C/D ratio.
  • Thyroid hormone replacement therapy did not induce any significant alterations in these measured ocular parameters.
  • The study suggests that hypothyroidism, in the absence of orbitopathy, has a minimal impact on major ocular structures relevant to glaucoma and corneal health.